(Ajax)
"All we need to do is fix that and find out how to replace dying brain cells(and doctors did recently transplant brain cells to a stroke victim) and we would have an indefinite lifespan, but since science is teh ebil I'm sure all the fundies wont be taking advantage of it, and the world will be better off without them."
Oh, man, Ajax. The fundies won't just avoid using such technology; they'll fight tooth and nail to stop it from ever seeing the light of day. As will the non-fundie theists, for that matter, and even a few non-believers.
Why, one might ask? Simple: the fear of death is, far and away, the thing people in control of others can most easily exploit when controlling said others, from a fire-and-brimstone preacher with his small flock of two dozen or so, to the people who are the powers behind the various heads of State throughout the entire world.
If this death-denying technology becomes common scientific knowledge...well, would you play in a Bridge game where, after your bid wins and you're ready to start capturing tricks, you had to hand the Ace of the Trump suit to one of your opponents in exchange for the Deuce of a non-Trump suit? Neither would those in power over the world. It'd take an underground revolution of the kind shown at the climax of Johnny Mnemonic for such knowledge to ever have a chance.
(BTW, no, the bittersweet irony inherent in the analogy of an atheist possibly being the one who's guarding the back door to the Garden of Eden to keep the Tree of Life off-limits is not lost on me.)